Solidworks 2014 Simulation Issues

Simulation Generality
1

Hi everyone.

 

Here I have a small problem with a static analysis of an assembly

I get error messages when I run the scan and I don't understand what's wrong 

I have indicated the fixed geometry which is located in the holes of the carriages at the back (axle)

The force on the plate is ok and I have in my opinion connected the assemblies well with screws 

 

So the mesh doesn't have a problem but it gives me these error messages when I run the simulation:

 

 

 

Apparently the problem comes from the screws (connector) but I can't say what's wrong? Aren't the bolts set from the beginning (by default?)

 

Thank you for your help.

 

 

2

I think you're starting with a model that's too complex.

I usually start my studies in a very simple way. The idea is to have a model that "works" and then each time you add a hypothesis that allows you to get closer to reality and you check if "it works" and if it is coherent. Once all your hypotheses have been made, then and only then do you densify your mesh for the final calculation.

Note that the connectors add many additional equations and therefore a significant calculation time.

If I were you, I would start by putting a "global solidarity contact" and I would make a first calculation. then you refine as best you can...

At least that's my way of proceeding, because otherwise you don't know where you have it anymore and it's a hassle to know what works or not.

2 Likes
3

Ok I'll try this way then. 

When you say try to have only a global solidarity contact, what does it mean because I have my platform which is in welded mechanical element so he tells me his : 

 

Do I have to remove these constraints as well? 

4

All your contacts between you are defined as "no penetration"

In other words, they can slide over each other, peel off but not interfere with each other.

right click > change the definition > you change to "solidarity"

3 Likes
5

Ok well I did as you told me and visibly for the moment everything works.

 

I'll see the results because for the moment in the first simulation it tells me that there is no deformation in the carriage (personally I only half believe it)  and I'll add elements and we'll see if it brings a change if I ever find a solution I'll come back and have a look around here:) 

thank you again.

6

Already you start with something that works;)

Now add hypotheses one by one, and check that the behavior is close to reality.

Good luck;)

1 Like
7

Here I have just finished the study report. Indeed, by proceeding in this way, we manage to eliminate the problems 1 to 1, thanks again to you.

 

Have a nice day.

1 Like